| 摘要 |
Pipelined digital processing circuitry for use with a particle size measurement system, such as that employed in automated hematology systems, measures the "center" amplitude of a pulse produced by a particle or cell passing through a flow cell measurement aperture, such as the detection aperture of a Coulter Principle-based electronic particle analysis system. The circuitry of the invention processes successive-pulse samples by means of a half-peak/half-width methodology that analyzes each pulse as its continuously sampled and temporarily stored in memory. Concurrent analysis of the data in memory during storage locates the pulse width at a prescribed percentage (e.g., 50%) of the peak amplitude of the pulse. This pulse width data is then processed to determine the pulse amplitude at the midpoint of the width of the pulse between its mid-peak values on rising edge and fall edge portions of the pulse. |
